Author Topic: Note on the use of NiMH rechargeable batteries , for sensors that use them  (Read 292 times)

0 Members and 1 Guest are viewing this topic.

Offline Rover1822

  • Forecaster
  • *****
  • Posts: 897
    • Mini Wind and Solar Data project
This for sensors that use them, such as the exterior PM2.5 sensor WH41.

Here in the US we can get Duracell NiMH batteries pretty much anywhere, local stores, etc. However, one needs to closely read the package as some will have a capacity of 1250 mAhr , and some will be labelled 2500 mAhr. There is virtually no difference in appearance between the two except the fine print on the batteries.

In short, you are way better off with the higher mAhr version as it will sustain longer during cloudy events. And it is quite noticeable. I have the misfortune of buying the lower capacity ones and couldn't figure out why I needed more frequent external charging than previously. then i read the small print on the batteries.

These 1250 mAhr batteries will now serve duty in some remote controls instead, and I have replace with 2500 mAhr for those sensors. I guess it is a case of caveat emptor .

This more than likely also applies to other manufacturers, and ones that tell the truth on capacity (a whole different issue)
« Last Edit: November 20, 2021, 01:00:57 PM by Rover1822 »
Ambient:WS-2000,PM 2.5 x2,WH31B x2,WH40E,WH31P
EcoWitt: GW1100,GW1000 x4,WH31 x2,WH57,WH51 x12, WH40,WH5360B,WN34S
Web Sites: WU, Ambient Weather , Ecowitt.net , Ecowitt.net (TEST)
Personal Sites: Weather Cam

Offline solartempest

  • Senior Member
  • **
  • Posts: 83
Re: Note on the use of NiMH rechargeable batteries , for sensors that use them
« Reply #1 on: November 26, 2021, 07:19:27 PM »
This more than likely also applies to other manufacturers, and ones that tell the truth on capacity (a whole different issue)
An important part is not only the rated capacity, but also longevity of the cells after many cycles. You might find the following real-world testing interesting: https://www.youtube.com/watch?v=-jXQNY6rve8

The Duracells here are quite expensive. Personally, I have used Eneloops for most applications. Ikea is very promising from a cost-perspective and based on the testing, which I've read for a few years now in other forums. Over many years of demanding use for photography, I found the typical Energizers to have quite bad performance over time.
Ecowitt GW1000, HP2553BC, WS80, WH51x3, WH41, WH40, WH32, WH31x2, WH57x2.

Offline Platokidd

  • top side land of Lincoln
  • Forecaster
  • *****
  • Posts: 337
Re: Note on the use of NiMH rechargeable batteries , for sensors that use them
« Reply #2 on: November 28, 2021, 07:31:44 AM »
Just upgraded (I think) to Tenergy Premium PRO Rechargeable AA Batteries, High Capacity 2800mAh. Will see how long they last and well they work.
CWOP:FW5295 | :FW6969
WU:KILPLATO3 | :KILROCK100| :KILCRYST84

Ambient    
2- WS-2000 2-WS-2902A ARRAYS 1-CONSOLE 2-WH40-RAIN 1-WH31L 1-METEOBRIDGE 2-PM2.5
3-WH-31E 1-SRX100LX 1-WH31SM
ECOWITT
3-HP2552-WH51 6-WH31-WH45-WH55
3-GW1000 1-GW1100- 2-WH51 1-WH32EP

1-Stratus Rain Gauge